Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
The truth is, that the more advanced races in ancient times were, as at the present day, constantly exchanging the implements and the plants employed in cultivation; and when the annals of China refer the origin of Chinese agriculture to the introduction of five species of grain that took place under a particular king in a particular year, the story undoubtedly depicts correctly, at least in a general way, the relations subsisting in the earliest epochs of civilization. A common knowledge of agriculture, like a common knowledge of the alphabet, of war chariots, of purple, and other implements and ornaments, far more frequently warrants the inference of an ancient intercourse between nations than of their original unity. But as regards the Greeks and Italians, whose mutual relations are comparatively well known, the hypothesis that agriculture as well as writing and coinage first came to Italy by means of the Greeks may be characterized as wholly inadmissible.
On the other hand, the existence of a most intimate connection between the agriculture of the one country and that of the other is attested by their possessing in common all the oldest expressions relating to it; -ager-, --agros--; -aro aratrum-, --aroo arotron--; -ligo-alongside of --lachaino--; -hortus-, --chortos--; -hordeum-, --krithei--; -milium-, --melinei--; -rapa-, --raphanis-; -malva-, --malachei--; -vinum-, --oinos--. It is likewise attested by the agreement of Greek and Italian agriculture in the form of the plough, which appears of the same shape on the old Attic and the old Roman monuments; in the choice of the most ancient kinds of grain, millet, barley, spelt; in the custom of cutting the ears with the sickle and having them trodden out by cattle on the smooth-beaten threshing-floor; lastly, in the mode of preparing the grain -puls- --poltos--, -pinso- --ptisso--, -mola- --mulei--; for baking was of more recent origin, and on that account dough or pap was always used in the Roman ritual instead of bread.
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Reference address : https://www.ellopos.net/elpenor/rome/1-02-earliest-migrations-italy.asp?pg=17